Milestone BASE 2.7

Major features in this milestone:

• Extension system for the web client. It will allow you to add menu items, toolbar buttons, etc. at some selected places in the web interface. See tickets #436 and #933.
• The MeV connection will no longer be included in the core distribution. It will be shipped as an extension. See ticket #932.

IMPORTANT! Starting with this release, BASE needs Tomcat 6 or later! See ticket #948.